Stop history search going on beyond the start of history....

chrome/browser/history/history_querying_unittest.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/basictypes.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "chrome/browser/history/history.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 181 matching lines @@
   // only test collapsing.
   options.most_recent_visit_only = true;
   QueryHistory(std::wstring(), options, &results);
   EXPECT_EQ(4U, results.size());
   EXPECT_TRUE(NthResultIs(results, 0, 4));
   EXPECT_TRUE(NthResultIs(results, 1, 2));
   EXPECT_TRUE(NthResultIs(results, 2, 3));
   EXPECT_TRUE(NthResultIs(results, 3, 1));
 }
 
+TEST_F(HistoryQueryTest, ReachedBeginning) {
+  ASSERT_TRUE(history_.get());
+
+  QueryOptions options;
+  QueryResults results;
+
+  QueryHistory(std::wstring(), options, &results);
+  EXPECT_TRUE(results.reached_beginning());
+
+  options.begin_time = test_entries[1].time;
+  QueryHistory(std::wstring(), options, &results);
+  EXPECT_FALSE(results.reached_beginning());
+
+  options.begin_time = test_entries[0].time + TimeDelta::FromMicroseconds(1);
+  QueryHistory(std::wstring(), options, &results);
+  EXPECT_FALSE(results.reached_beginning());
+
+  options.begin_time = test_entries[0].time;
+  QueryHistory(std::wstring(), options, &results);
+  EXPECT_TRUE(results.reached_beginning());
+
+  options.begin_time = test_entries[0].time - TimeDelta::FromMicroseconds(1);
+  QueryHistory(std::wstring(), options, &results);
+  EXPECT_TRUE(results.reached_beginning());
+}
+
 // This does most of the same tests above, but searches for a FTS string that
 // will match the pages in question. This will trigger a different code path.
 TEST_F(HistoryQueryTest, FTS) {
   ASSERT_TRUE(history_.get());
 
   QueryOptions options;
   QueryResults results;
 
   // Query all of them to make sure they are there and in order. Note that
   // this query will return the starred item twice since we requested all
@@ skipping 126 matching lines @@
 
   // Now with collapsing.
   options.most_recent_visit_only = true;
   QueryHistory(std::wstring(L"Other"), options, &results);
   EXPECT_EQ(1, results.urls().size());
   EXPECT_TRUE(NthResultIs(results, 0, 4));
 }
 */
 
 }  // namespace history